Digital Electronics - Section 1 (4)
Digital Electronics - Section 1
| 25. | A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is |
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| 26. | In a ripple counter, |
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Answer: Option A Explanation: In a ripple counter the effect ripples through the counter. |
| 27. | The basic storage element in a digital system is |
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Answer: Option A Explanation: Storing can be done only in memory and flip-flop is a memory element. |
| 28. | A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is |
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= 8.333 say 8| 29. | The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is |
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Answer: Option B Explanation: The largest negative number is 1000 0000 = -128. |
| 30. | An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if |
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Answer: Option B Explanation: All AND inputs must be 1 and inhibit 0 for output to be 1. |
| 31. | The circuit of the given figure realizes the function |
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| 32. | Decimal 43 in hexadecimal and BCD number system is respectively. |
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Answer: Option B Explanation: (43)10 = (2B)16 (43)10 = (01000011)2 . |